- Screening for thrombophilia, including antiphospholipid antibodies and other coagulopathies (any abnormal finding must be retested at mandatory 3-month follow-up visit >12 weeks from initial testing or >4 weeks after cessation of anticoagulation at any later time point); mandatory tests include anticardiolipin antibodies, lupus anticoagulant, anti-β2-glycoprotein antibodies, factor V mutation (or aPC resistency ruled out), factor II mutation, homocysteine, antithrombin III, protein C, and protein S